Kennametal 6676966 Square End Mill 3/8 in 4 Flute Carbide

Product Description

The KENNAMETAL 6676966 is a solid carbide square end mill designed for high-performance milling in demanding materials. It features a 3/8 inch cutting diameter, 7/8 inch length of cut, and a 2-1/2 inch overall length. The 4-flute geometry with a variable helix angle of 36 to 39 degrees and variable index reduces chatter and improves chip evacuation. The AlTiN coating provides thermal resistance and extended tool life at elevated cutting temperatures. Part of the H1TE series in grade KCPM15, this end mill is center-cutting and suited for profiling, slotting, and peripheral milling operations. It is installed by machinists and CNC tooling specialists working in job shops, aerospace, and production machining environments.

This end mill is engineered for use on steel, stainless steel, cast iron, high-temperature alloys, and hardened materials — material codes P, M, K, S, and H. The H1TE series is a regular-length, single-end design with a right-hand cut and right-hand spiral flute, making it appropriate for standard vertical and horizontal milling machine setups. It is a general-purpose tooling solution across a wide range of machining applications where tool stability and coating durability are priorities.

Key Features

• Variable helix angle (36 to 39 degrees) with variable index reduces vibration and improves surface finish
• AlTiN coating provides high thermal resistance for dry or near-dry cutting in tough materials
• Solid carbide construction in grade KCPM15 delivers rigidity and wear resistance
• Center-cutting design allows plunge entry into the workpiece
• 4-flute spiral geometry balances chip evacuation and rigidity for ferrous and high-temp alloy applications
• Single-end, right-hand cut and right-hand flute configuration for standard CNC and manual mill setups

Compatibility

Designed for use in materials including steel, stainless steel, cast iron, high-temperature alloys, and hardened materials. Compatible with 3/8 inch tool holders and collets on standard CNC machining centers and manual milling machines.

Installation Notes

Installation is performed by a machinist or CNC tooling technician. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Seat the 3/8 inch shank fully into a matching collet or end mill holder and torque to the tool holder manufacturer specification. Verify runout after installation before beginning a cut.